Method of preparing architectural and engineering drawings

ABSTRACT

INVENTION INCLUDES THE STEPS OF MANUALLY PREPARING A MASTER COPY CONTAINING INFORMATIVE MATTER SUPPLEMENTAL TO A MASTER DRAWING, TRANSFERRING SAME BY ELECTROSTATIC OR XEROGRAPHIC PROCESS WITH EITHER VAPOR OR HEAT FUSION OF A POWDERED INK IMAGE OF THE MASTER COPY TO THE PLASTIC FILM, AND APPLYING THE FILM SHEET BY MEANS OF ITS ADHESIVE BACKING TO THE MASTER DRAWING.   A MASTER DRAWING, ARCHITECTURAL OR ENGINEERING, TO WHICH IS ADHESIVELY ATTACHED A TRANSPARENT PLASTIC FILM SHEET HAVING AN ACETATE OR POLYESTER BASE ONTO WHICH INFORMATIVE MATTER SUPPLEMENTAL TO THE SUBJECT OF THE MASTER DRAWING HAS BEEN TRANSFERRED FROM A MANUALLY DRAFTED AND TYPED MASTER COPY BY AN ELECTROSTATIC OR XEROGRAPHIC TYPE PROCESS. THE FILM SHEET HAS A PRESSURE SENSITIVE BACKING PROTECTED BY A WAX TYPE PAPER SHEET. AFTER REMOVAL OF THE PROTECTIVE SHEET, THE FILM SHEET IS APPLIED BY PRESSURE TO THE MASTER DRAWING AND APPEARS AS AN INTEGRAL PRT THEREOF, WITH THE TRANSFERRED MATTER IN CLEAN SHARP LINES AND LETTERS WHICH DO NOT BECOME SEMARY WHEN HANDED IN USE. THE PROCESS OF PREPARING DRAWINGS EMBODYING MY

A ril 17, 1973 R. E. CLAY 3,128,190

METHOD OF PREPARING ARCHITECTURAL AND ENGINEERING DRAWINGS Filed Nov. 2, 1970 2 Sheets-Sheet :1

4/i ighring fixtures shall be furnished and instol led s l/hown on the drawings, details, etc. and us iisted in the Fixture Schedule. The fixtures shall be complete with oil the necessary accessories which shall include, but not limited to: suspension stems, canopies, plaster fr l2 recessed boxes, mounting poles, etc; hickeys; H

cosings, etc.'; sockets, lomphoiders, etc.; but

reflectors, louvers, diffusing lenses, etc=; lo'mps, tubes, etc.

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EQUIPMENE SCHED E UNIT FUNCTION you 12 A WIRE No. COND. P DEV. STAR- SEE DISC. REMARKS NO. ,2 FL. SIZE WIRE SIZE A, P TER NOTE sw. EFI' Exm WvsHP 115 1 4.4 #12 .2 -1/2" 1 MAN 3 151 2 i/[ZVFAN l/4HP 11s 1 5.8 #12 2 1/2" 20 1 MAN 3 .ge i lx ii-rAN 3/4HP 20s 3 3o #12 3 1/2" 20 3 MAG 1 3o '4A c1 AIR coNo. HP 20s 3 67.8 114 3 1-1/4" 3 M116 1 100 'cui COND. UNIT GOHP '20s 3,1 8 3/0 3 2'' 200 3 MA@ 1 20o P1 PUMP i/ZHP 11s, efa #12 2 1/2" 20 1 MAN 3 Z4 P2 PuMP' I/6HP ,ae i 4.4 #12v 2 1/2" 20 1 MAN 3' P3 PuMP 1/4;1,P,115 1 5.8 1112 2 1/2" 20 1 MA 3 11111 UNIT 111e,, 55 146 113 1 4.4 #12 2 1/2" 2o 1, W 3

UH2 UNIT 1 4/51-1P 115 1 5.2 #12 '2 1/2" 29 'MAN 3 UH3 1135121411? i/6HP 115- 1 4.4 #12 2 1/2" ',21 MAN 3 I I Q 2, v 13 1 I IO 1F-i11g.. l1 INVENTOR. A ROBERT E. CLAY ATTORNEY April 17, R. E. CLAY METHOD OF PREPARING ARCHITECTURAL AND ENGINEERING DRAWINGS Filed Nov. 2, 1970 2 Sheets-Sheet E DRAFTSMAN TYPEWRITTEN FORM DRAWING SHEET CAMERA ELECTROSTATIC IMAGE PLATE TRANSFER PROCESS- IMAGE PLATE TO PLASTIC FILM SHEET HEAT OR VAPOR FUSER OF IMAGE TO PLASTIC FILM SHEET REMOVAL OF PROTECTIVE BACKING APPLICATION OF TRANSPARENT "STIKON" To LARGE MASTER DRAWING JFTE Z I INVENT R. ROBERT E. CLAY BY r ATTORNEY I United States Patent 3,728,190 METHOD 0F PREPARING ARCHITECTURAL AND ENGINEERING DRAWINGS Robert E. Clay, 8260 E. 105th Ave., Henderson, Colo. 80640 Filed Nov. 2, 1970, Ser. No. 86,102 Int. Cl. 133% 31/04 US. Cl. 156--235 3 Claims ABSTRACT OF THE DISCLOSURE A master drawing, architectural or engineering, to which is adhesively attached a transparent plastic film sheet having an acetate or polyester base onto which informative matter supplemental to the subject of the master drawing has been transferred from a manually drafted and typed master copy by an electrostatic or xerographic type process. The film sheet has a pressure sensitive backing protected by a wax type paper sheet. After removal of the protective sheet, the film sheet is applied by pressure to the master drawing and appears as an integral part thereof, with the transferred matter in clean sharp lines and letters which do not become smeary when handled in use. The process of preparing drawings embodying my invention includes the steps of manually preparing a master copy containing informative matter supplemental to a master drawing, transferring same by electrostatic or xerographic process with either vapor or heat fusion of a powdered ink image of the master copy to the plastic film, and applying the film sheet by means of its adhesive backing to the master drawing.

This invention relates to architectural and engineering drawings and method of preparing same. Architectural and engineering drawings include those commonly known as mechanical, electrical, structural, and other kinds of drawings, heretofore prepared by draftsmen who manually portray the subject matter of the drawings and apply additional informative material thereon by hand lettering. The informative material is supplemental to the main subject matter of the drawing. Drawings of this kind are referred to as master drawings. They vary in size, commonly 24 x 36 inches and larger.

Efforts have been made to lessen the time required for hand-lettering the supplemental material, such as general specifications and parts lists or equipment schedules, on the master drawings. For this purpose, the informative material has been typed directly on a part of the master drawing by means of a typewriter provided with a long, open end carriage capable of receiving the master drawing. This method of applying the supplemental matter has been found objectionable due to the necessity for providing a special typewriter, the expense involved, and the fact that the typed material becomes smeared when handled in use.

Also, to eliminate the manual effort and time required in hand-lettering the informative material on the master drawing, such supplemental matter has been typed on smaller sheets of paper by using a conventional typewriter, and then the typed sheet has been taped on the master drawing. This method also is objectionable because the typed material becomes smeared, and because of the unattractive appearance of the master drawing with taped sheet applied thereto.

The objects of the invention, therefore, are to avoid the objections resulting from prior art methods of pre-' paring master drawings, particularly to eliminate the expense and time required for manually applying informative material by hand lettering; to avoid the use of special typewriters for typing general specifications and equipment schedules and the like directly on master drawings; to

3,728,190 Patented Apr. 17, 1973 ICC avoid the use of separate sheets bearing typed informative material applied to master drawings by taping; and to avoid use of typed material which becomes smeared in use regardless of whether it has been typed directly on the master drawing or on a separate sheet attached thereto by taping or other means.

The main object of the invention is to produce master drawings, such as architectural, engineering and other drawings of all kinds, provided with informative material supplementing the manually drawn parts of the drawings, in which the informative material is prepared without the use of hand lettering and does not become smeared or otherwise marred in use.

The objects and advantages of the invention are achieved by preparing a master copy sheet on which is placed all the informative material copy heretofore manually portrayed and hand lettered. Such copy may include a drawing of a detail or part, a general specification, and an equipment schedule or parts list, and the like. The master copy is prepared by using ink, ink type or pencil lines on a high contrast white sheet with transparent or opaque character. Lines form the drawing of the detail, building, etc. Typewritten material such as the general specification is put on high contrast bond which may have a pre-printed form thereon prior to typing the equipment schedule or the like thereon.

Next the master copy is transferred to a transparent plastic film sheet which has a pressure sensitive adhesive backing protected by a removable wax type paper sheet. The transparent plastic film sheet has an acetate or polyester base and is nonsensitized. Such film sheets with their adhesive backing and protective wax type paper sheet are known commercially by trademarks Permafilm, Mat Tack, and Stanpat.

The transfer of the master copy to a transparent plastic film sheet of the character described is a manual or automatic electrostatic or xerographic type process employing either vapor or heat fusion of powdered ink image of the master copy to the plastic film sheet. An example of the process is that performed by the Xerox machines well known commercially.

Next, the transparent film sheet with the transferred master copy thereon, known by applicants trademark Stikon, is ready for application to the master drawing. The protective wax type paper sheet is removed from the plastic film, and the film is placed to overlie the master drawing, with the pressure sensitive adhesive side facing the master drawing. Pressure applied to the plastic film sheet causes it to adhere to the master drawing and to appear as part of the master drawing.

In the drawings:

FIG. I is a plan view of a transparent plastic film sheet, with transferred master copy thereon, provided with a pressure sensitive adhesive backing protected by a removable wax type paper sheet.

FIG. 2 is a flow sheet on which are set forth the steps of the method for preparing master drawings such as architectural and engineering drawings and the like em- .bodying my invention.

FIG. 3 is a sectional view in the plane of the line 3--3 of FIG. 1.

FIG. 4 is a sectional view showing the transparent film sheet and adhesive backing after the protective wax sheet has been removed, and the transparent film and adhesive backing have been applied to a master drawing.

Referring to FIG. 1 of the drawing, 10 designates as a whole a transparent plastic film with pressure sensitive adhesive backing protected by a wax paper sheet, such as the Permafilm and other similar plastic films heretofore described, on which informative material contained on a master copy sheet (not shown) has been transferred by the electrostatic or xerographic type process aforementioned. A small drawing of an electric panel 11, together with general specification material 12 and equipment schedule 13 on a pre-printed form, constitute an example of the informative material transferred from the master copy.

On the sectional view of FIG. 3, the plastic film is designated 15, the adhesive backing 16 and protective wax type paper sheet 17. In FIG. 4 are shown the plastic film 15 with adhesive backing 16 after the wax paper 17 has been removed and the plastic film and adhesive backing have been applied to a master drawing 20.

Referring to the flow sheet, FIG. 2, the manually prepared master copy consists of the draftsmans drawing of a detail such as an electrical panel, for example, together with the typewritten material such as a general specification, and a form on which may be typed the equipment schedule or other information related to the manually drawn views on the master drawing. This is informative material such as indicated at 11, 12 and 13 on FIG. I (transferred from a master copy).

After the master copy has been prepared to supplement a particular master drawing, the master copy is subjected to the four steps described on the flow sheet as Camera, Electrostatic Image Plate, Transfer Process-Image Plate to Plastic Film Sheet, and Heat or Vapor Fuser of Image to Plastic Film Sheet. These steps are performed automatically in a Xerox machine, but may be performed manually, for the purpose of transferring the master copy material to the transparent plastic film heretofore described as Permafilm, etc. This is the plastic film sheet designated in FIG. -1, consisting of the film 15, adhesive backing 16 and protective sheet 17 as shown in FIG. 3.

The following step of my method for producing a master drawing without hand lettering of informative material is shown on the flow sheet of FIG. 2 as Removal of Protective Backing, and the final step is the Application of Transparent Stikon to Large Master Drawing.

The informative supplemental material, such as shown, for example, on FIG. 1, is transferred from the typewritten material on the master copy (with or without hand drawn detail drawing) to the transparent plastic film by the method described, in clean, sharp lines and letters which do not become smeary or smudgy when the master drawing is handled in use.

The plastic film sheet 10 may be reproduced as often as desired. If the same supplemental material is required on a number of master drawings, one of the processed film sheets may be stored and additional processed film sheets prepared for application to different or similar manually drafted master drawings. The plastic film sheets may be prepared by subjecting the manually prepared master copy to the described process, repeatedly, or additional film sheets may be prepared from a previously prepared plastic film sheet with the copy thereon.

The master drawing may be paper, linen or Mylar. The latter is preferred because of its superior stability. However, the processed transparent plastic films with master copy of informative material supplemental to the subject of the master drawing thereon adhere to any kind of master drawing and appear as an integral part thereof when applied by pressure as described.

What is claimed is:

1. The method of preparing architectural and engineering drawings and the like without hand lettering comprising the steps of (a) preparing a master drawing sheet by manual drafting of subject matter thereon,

(b) preparing a master copy sheet by typing on high contrast bond informative matter supplemental to the subject matter drawn on the master sheet,

(0) electrostatically or xerographically transferring the matter on the master copy sheet to a transparent plastic film having an acetate or polyester base and a pressure sensitive backing protected during processing by a protective sheet,

(d) removing the protective sheet, and

(e) applying the plastic film sheet with transferred matter thereon to the master sheet in overlying adhlering relationship by pressure on the plastic film s eet.

2. The method defined by claim 1, in which the electrostatic or xerographic type process is performed with either vapor or heat fusion of a powdered ink image of the master copy to the plastic film sheet.

3. The method defined by claim 1, in which the transferred typewritten matter appears on the transparent plastic film in clean sharp lines which do not become smeared in use.

References Cited UNITED STATES PATENTS 2,509,847 5/1950 Story 156-277 X 3,354,464- 11/ 1967 Kenmitsukatani et al. 346--74 2,835,987 5/1958 Heiser 161-6 X 2,855,324 10/1958 Van Doran 11717.5 3,549,447 12/1970 Bresniek 156-230 WILLIAM A. POWELL, Primary Examiner US. Cl. X.R. 

